Alright I'm using windows 10 and Arduino RFID kit 1, and I can't upload my sketch, this is the error code
M:\Challenge\ARDUINO\sketch_jan24a\sketch_apr18a\sketch_apr18a.ino:11:20: fatal error: Keypad.h: No such file or directory
#include <Keypad.h>
^
compilation terminated.
exit status 1
Error compiling for board Arduino/Genuino Uno.
Please help!